Gravity Probe B

Testing Einstein's Universe

Special & General Relativity Questions and Answers

Will we
ever be able to move through time?

There are
lots of plausible ways to move rapidly into the
future
by traveling near the speed of light. There
are no known ways to
reverse this trick to visit
times in the past. I know there have been
several
theoretical physicists who have advocated using
cosmic strings and
worm holes, but there is no
evidence that cosmic strings and wormholes are
real physical objects. Theory is strewn with
perfectly good ideas that nature
simply never
bothered to take advantage of...such as tachyons.